The SC ISO Servicio Course 320 thread per inch clincher has proved itself successful in road races all over the world, but in its new ISO version it is destined for even greater success. Further features are the new ISO grip tread compound for reduced rolling resistance and better grip in the wet and the new composite Corespun K 320 TPI casing that uses a blend of Polycotton (cotton and polyester) and KevlarŪ threads. The very high thread density of 320 TPI (equivalent to more than 1.100 threads per decimeter!) ensures maximum comfort even at high inflation pressures, while the added KevlarŪ means even better cut resistance. The PRB puncture resistant belting placed under the tread makes the Corsa ISO SC exceptionally reliable. Available in & 700 x 23 and 700 x 25 black with gum colored sidewall / 220 grams.